Amphiphilic poly(acrylic acid-b-styrene-b-isobutylene-b-styrene-b-acrylic acid) pentablock copolymers from a combination of quasiliving carbocationic and atom transfer radical polymerization

Storey, Robson F.; Scheuer, Adam D.; Achord, Brandon C.

doi:10.1016/j.polymer.2004.12.041

Cited by 43 publications

(35 citation statements)

References 32 publications

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“…Many more efforts have focused on the synthesis of linear multiblock copolymers containing PIB segments. For example, block copolymers containing PIB as well as polystyrenes, poly(acrylic acid), polyamide, polypivalolactone, poly(methyl methacrylate), poly( N ‐isopropylacrylamide) polyurethanes and polyalloocimene have been synthesized and studied. Many of these PIB‐based block copolymers incorporated glassy or semicrystalline blocks, enabling them to behave as thermoplastic elastomers.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, properties and degradation of polyisobutylene-polyester graft copolymers

Turowec

Gillies

2016

Polym. Int.

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The development of copolymers is a promising approach for combining the favorable properties of two polymers and obtaining new properties of the combination. In this work, graft copolymers of polyisobutylene (PIB) and polycaprolactone or poly(d,l‐lactide) were synthesized and studied. Amine‐terminated polyesters were synthesized and were grafted onto an activated PIB backbone synthesized from butyl rubber, a copolymer of isobutylene and 2 mol% isoprene. The polyester content was tuned from 15 to 44 wt% by varying the molar mass of the polyester blocks and the number of molar equivalents used in the grafting reaction. The graft copolymers with higher polyester content underwent nanoscale phase separation, as demonstrated by differential scanning calorimetry and atomic force microscopy imaging. This was found to provide enhanced mechanical properties such as increased tensile strength and Young's modulus relative to the starting rubber or physical blends. Despite the significant polyester content of the graft copolymers and the susceptibility of the polyesters to degradation, the graft copolymers underwent negligible mass loss in 5 mol L−1 NaOH over a period of eight weeks. These results suggest that polyesters can be incorporated into PIB to tune and enhance its properties, while maintaining high chemical stability. © 2016 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

Synthesis, properties and degradation of polyisobutylene-polyester graft copolymers

Turowec

Gillies

2016

Polym. Int.

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“…The morphology of the systems is determined by the block length and composition, and gives rise to the unique thermal, mechanical and permeability properties of TPEs . TPEs based on polysiobutylene (PIB) inner blocks and polystyrene (PS) outer blocks have been extensively studied with emphasis on using controlled/living polymerization techniques to achieve specific block sequences and controlled phase separation . The gas and liquid permeability of these materials can be modified through the introduction of a polar phase, such as polyacrylic acid (PAA), which provides possibilities for additional triphasic morphologies, which will, in principle, allow for the tailoring of different diffusion pathways through the system …”

Section: Introductionmentioning

confidence: 99%

Phase separation and permeability in polyisobutylene-based miktoarm star polymers

Knauer

Zhu

Storey

et al. 2016

J. Polym. Sci. Part B: Polym. Phys.

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The phase behavior of (PS‐PIB)2‐s‐PAA miktoarm star terpolymers with varying volume fractions of PAA was investigated directly by transmission electron microscopy, atomic force microscopy, and small‐angle X‐ray scattering, and indirectly by thermogravimetric analysis and degree of water sorption. The microdomains of (PS‐PIB)2‐s‐PAA demonstrate a unique and unexpected progression from highly ordered cylinders, to lower ordered spheres, to gyroid structures with increasing PAA content from 6.6 to 47 wt %. Interestingly, the phase behavior in the miktoarm star polymer system is significantly different from that reported previously for the linear counterpart of similar composition (PAA‐PS‐PIB‐PS‐PAA), where a steady progression from cylindrical to lamellar morphology was observed with increasing PAA content. At low PAA concentrations, the morphology is driven primarily by the relative solubility of the components, while at high PAA content the molecular architecture dominates. Thermal annealing demonstrated the thermodynamic stability of the morphologies, indicating the potential for design of novel microstructures for specific applications through precise control of architecture, composition, and interaction parameters of the components. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2016, 54, 916–925

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“…Another attempt demonstrated by Müller et al involved the preparation of thiophene end-functionalized PIB and the subsequent metalation of the polymer chain end with an alkyllithium compound, followed by the polymerization of tert-butyl methacrylate with the generated macroanion [7]. Storey and coworkers reported the synthesis of poly(tert-butyl acrylate)-b-PIB-b-polystyrene (PS) triblock and poly(acrylic acid)-b-PS-b-PIB-b-PS-b-poly(acrylic acid) pentablock copolymers by the combination of carbocationic and atom transfer radical polymerization techniques [8,9]. In a recent publication, we also reported the synthesis of PIB-b-PMMA by a novel coupling approach combining living cationic and anionic polymerization techniques [10].…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of diphenylethylene end-functional polyisobutylene and its applications for the synthesis of block copolymers containing poly(methacrylate)s

Feng

Higashihara

Faust

2008

Polymer

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Amphiphilic poly(acrylic acid-b-styrene-b-isobutylene-b-styrene-b-acrylic acid) pentablock copolymers from a combination of quasiliving carbocationic and atom transfer radical polymerization

Cited by 43 publications

References 32 publications

Synthesis, properties and degradation of polyisobutylene-polyester graft copolymers

Synthesis, properties and degradation of polyisobutylene-polyester graft copolymers

Phase separation and permeability in polyisobutylene-based miktoarm star polymers

Facile synthesis of diphenylethylene end-functional polyisobutylene and its applications for the synthesis of block copolymers containing poly(methacrylate)s

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